I used Vibrant with success. It takes time. Embrace the new tank syndrome. It's not easy to sit back and watch and it seems to take forever but your tank is diversifying and building its microbiome. Undesirable algae and dinos will flare up and this is good at the early stage. Keep on keeping on. It will balance out. The more stable you can keep parameters, the better. And the more bacteria diversity you can introduce, IMO, the better. After all, Vibrant is doing and is based on that.
Adding starter corals, inverts, even sand from an established tank is found to help build diversity. There's a lot written about bacteria and reef tank health which is in-part what Vibrant is doing.
Starting a tank journal is a good way to track and share specifics. You'll see in many others, the same issues you're addressing. I know I pulled my share of hair in the 6-12 month stage.
For more about bacteria, here's a start:
Reading through different coral scientific publication, we came across one, that could be quite relevant for us reef aquarist. In this publication published in Nature, scientist from the Red Sea…
reefbuilders.com
https://aquabiomics.com/articles/core-aquarium-microbiome
Lots more to read.